package cn.uce.common.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @Author: May
 * @Description:
 * @Date: 2018/5/29 19:16
 */
@Component
public class SpringContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext; // Spring应用上下文环境

    /*

     * 实现了ApplicationContextAware 接口，必须实现该方法；

     *通过传递applicationContext参数初始化成员变量applicationContext

     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        setContext(applicationContext);
    }

    public static void setContext(ApplicationContext context) {
        SpringContextUtil.applicationContext = context;
    }



    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }


    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) applicationContext.getBean(name);
    }

}
